Before and after. Ryan Williams ate nothing but McDonalds for a month. Picture: SWNS/MegaSource:Mega

The UK man lost 7kg in just one month.

A postman from the UK has gone to extreme measures to prove his point on the importance of exercise by eating nothing but McDonald’s for weeks and losing more than 7kg.

Ryan Williams, 29, launched his fast food mission to disprove filmmaker Morgan Spurlock’s famous 2004 Super Size Me documentary.

In the now iconic documentary, the American filmmaker ate nothing but McDonald’s for 30 days and gained 12kg.

But Ryan from Cheltenham, Gloucestershire in the UK, pointed out that he was doing no exercise during the challenge, The Sun reports.

Ryan, who documented his food-eating-journey on his YouTube channel said wanted to make a two main points:

  • To prove the amount of calories you eat is more important than what you eat.
  • And the vital importance of exercise 

So Ryan set his own challenge, and ate nothing but McDonald’s for a month, making sure to eat everything on their menu at least once, as Spurlock did 14 years ago.

However, something Spurlock definitely didn’t do was spend an hour at the gym each morning during his challenge, something Ryan did do.

And he finished the month 7kg lighter than when he began, having lost just over two per cent of his body fat.

Nothing but McDonalds for a month…

Speaking about his challenge on his Youtube Channel Ry, Ryan said: “I’ve wanted to do this for a few years, but I never found the right time.

“But recently I saw an advert for 50 years of Big Mac, and it made me think that there’s quite a lot of negative feeling towards McDonald’s, with regards to it being unhealthy.

“Ever since I saw Super Size Me, I thought that the way he (Morgan Spurlock) did the experiment, was unfair.

“He ate 5000 calories a day and didn’t do any exercise. I didn’t feel like it was a surprise he became so unhealthy,” he said.

“It’s obvious that calories are quite important, but the average Joe doesn’t always know how to balance the recommended calorie intake with staying in shape.

“I’m not suggesting that eating just McDonald’s is a healthy way of living, but I wanted to show that it’s purely a calorie game, as opposed to the types of food you eat.”

Everything on the menu at least once.

Ryan began the month eating 2500 calories per day,  the recommended calorie intake for a male adult, But dropped down to 2300 by the end of the second week.

And in the final two weeks of the challenge, he dropped his calories slightly further, depending on how his weight and body fat index was performing.

In the same format as the original program, he made it a rule to eat everything off the menu at least once — from Big Macs and McFlurrys to salad boxes and bags of fruit.

Ryan said: “Prior to the challenge I was probably in the worst state I’d been in in a few years.

“My diet wasn’t great, I would eat a lot of food — about 5000 calories — in a day, lots of biscuits and junk food, and I wasn’t going to the gym at all.

“Before that, for about 10 years, I was always very active and went to the gym four or five times a week.

“So for me, this challenge was partly about what I could do to help myself get back to that, while also having a bit of fun.”

After beginning at 89kg, Ryan was down 7kgs to 82kg by the end of the month and had gone from 10.85 per cent body fat during a seven-site skinfold test, down to 7.59 per cent.

If you want to watch his experiment, you can do so HERE.